Just as a reminder, before Rosenberg was fired for his virulently anti-Semitic views at Media Matters:

M.J. Rosenberg served as a Senior Foreign Policy Fellow with Media Matters Action Network, and prior to that worked on Capitol Hill for various Democratic members of the House and Senate for 15 years. He was also a Clinton political appointee at USAID. In the early 1980s, he was editor of AIPACs weekly newsletter Near East Report. From 1998-2009, he was director of policy at Israel Policy Forum.